Plumberjs trap



(No Model.)

9 J. HARTFORD. PLUMBERS TRAP.

N9. 499,975. Patented May 9,1899.

iii l I l Zrzesses: lm eizfoz 2 0 M dif TNE NORRIS PETERS C41.PHOTG-LITNQ, WASHINGTON D a NITED STATES PATENT Onrica.

JOHN HARTFORD, OF CHICAGO, ILLINOIS.

PLUMBERS TRAP.

=3PECIFIGATION forming part of Letters Patent No. 496,975, dated May 9,1893.

Application filed May 12, 1892.

T0 on whom it may concern.-

Be it known that I, JOHN HARTFORD, a citizen of the United States, and aresident of Chicago, county of Cook, and State of Illinois, haveinvented new and useful Improvements in Plumbers Traps, of which thefollowing is a specification, reference being bad to the accompanyingdrawings, illustrating the invention, in which- Figure 1 is a verticalcentral section of an ordinary S-shaped trap, the connecting waterchamber, a sectional elevation of a portion of the discharge pipe, and asectional elevation of the ventilating pipe and its downward extensiontaken on line Z Fig. 4. Fig. 2 is a longitudinal elevation of Fig. 1.Fig. 3 is a horizontal section of Fig. 1, on line X. Fig. 4 is a top, orplan view of Fig. 2. Fig. 5 is a plan of the top portion of the insidegas escape pipe.

The purpose of this invention is to make a perfect connection betweenthe soft metal of the trap and a hard metal jacket to which theventilating pipe is attached.

A, represents the water chamber, or enlarged portion of the trap, which,as is the custom, is generally made integral with the ordinary S-shapedportion B, B. The soft metal is integral with the enlarged portion A,and continues upward to form a pipe M, Fig. 1, whose crosssection iseccentric with a cross section of the enlarged portion, that is the pipeJ lies outward from the center of the enlarged portion that there may besufficient water space between the pipe J and the right hand pipe B ofthe trap. The inside of pipe M is cylindrical, but its exterior is inthe form of an inverted truncated cone from the lower edge D of thepeculiarly formed jacket, up to an annular flange which supports anoutwardly projecting flange K on the upper end of pipe J; and the softmetal extends up onto the periphery of the flange K to the flange ofpipe 0 where the flanged collar F is set tightly in place. To providemeans for supporting the collars F, a jacket 0 is formed to fit closelythe enlarged soft metal portion M and its lower edge is formed quitethin to fit the soft metal portion A closely without being sunk therein;and the portion D, by the nature of the construction is brought SerialNo. 432,738. (No model.)

down considerably lower than the other portion as shown at Figs. 1 and2; that it may have a leverage on the portion A, as against being turnedround, when collar F is turned on the screw thread formed on thecylindrical portion of the jacket 0. At E, rivets are shown projectingthrough the hard metal jacket 0; that this may be done the jacket isfirst formed of hard metal and the soft metal is cast inside of it, withthe casting of the trap; and the holes formed in the jacket are filledwith soft metal and the jacket is securely held in place, as against anyforce exerted by the collar. To set the soft metal yet more firmlyagainst the inner top portion of the jacket 0, the annularseat of theflange K is-not at first formed quite as deep as the flange is high;whereby the collar F sinks said seat K in the soft metal M, and thrustsit outward and brings the flange of pipe G gas tight, onto flange K; andthe connection is practically perfect. The pipe J is shown in LettersPatent granted to me on January 13, 1891, No. 444,751, and designated by1, except the pipe I, has a small opening through it,near its upper endand within the enlarged chamber.

In my present trap, I dispense with the hole and increase the capacityof the pipe J. By this means the pressure of air coming in at pipe G issuch as to follow the siphonage of the water flowing out of the enlargedportion, and as a result the pipe J is free internally from such water,except so much of its lower end as is required to form a seal betweenthe outgoing water and incoming air. The pipe J has no communicationwith the portion A except the opening at the lower end. In this respectthere is a distinction from the suspended pipe, in the patent mentioned;for in the latter, there is an opening through. it near the dome of theenlarged portion, such opening permits the water to fill the pipe J tothe same height of the water in the portion A. The connection of pipe Jwith portion A is gas tight, whereby any gas which may lie above thelower end of pipe J can produce no harm, but permits a free action ofthe gases from the sewer upward and pure downward according to thedirection of the pressure.

H, represents the means for draining the trap B, B; and L shows thebottom of the bowl.

An improvement in plumbers traps which consists of a U-shaped portionB,B,integral with an enlarged portion A, of a pipe M which is acontinuation of the portion A, has less areain cross sections issituated outside from the center of portion A, is cylindrical on itsinside and has the form of an inverted truncated cone at its exterior,and is provided with an annular flange-seat at the inner part of its topportion, in combination with-ahard metal jacket 0 which surrounds thepipe M, by casting the soft metal Within the jacket to project throughholes therein, the ventilating pipe J, provided with a flange, which hasa seat in the soft metal, a gas escape pipe above the pipe .T and theparts united by asuitable screw-cap F; as and for the purpose specified.20

JOHN HARTFORD. Witnesses:

G. L. CHAPIN, R. B. BACON.

